[Blas]

IF you have power to the flasher, and thru the flasher, and on to the stalk, (green/white) then next place to look is the stalk on the steering column. I'll assume you have hi and low beams that work on the stalk... You will find a green/yellow and a green/black on the plug from the "CAR SIDE" of the plug that connects to the stalk, they are the power to all the indicator bulbs. Note: The color of the wiring on the stalk side varies by stalk manufacturer...
Run a "FUSED" - !!! FUSED !!! - power jumper to one and then the other g/y & g/b wires on the "car plug" side... this will confirem if the wiring to the front and back sockets is ok, the indicator lights should power up (but not blink) when you jumper them. If that works it's the stalk. Contact me by email and I'll give you a source for a replacement stalk at a resonable price.